5257661 has 8 divisors (see below), whose sum is σ = 5570880. Its totient is φ = 4948128.

The previous prime is 5257627. The next prime is 5257711. The reversal of 5257661 is 1667525.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5257661 - 2⁶ = 5257597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5257261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2345 + ... + 4001.

It is an arithmetic number, because the mean of its divisors is an integer number (696360).

Almost surely, 2^5257661 is an apocalyptic number.

It is an amenable number.

5257661 is a deficient number, since it is larger than the sum of its proper divisors (313219).

5257661 is a wasteful number, since it uses less digits than its factorization.

5257661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843.

The product of its digits is 12600, while the sum is 32.

The square root of 5257661 is about 2292.9590053030. The cubic root of 5257661 is about 173.8858303317.

The spelling of 5257661 in words is "five million, two hundred fifty-seven thousand, six hundred sixty-one".